From fe48ab2b1d9006cdb8e0d937ad8d9a9370020c1c Mon Sep 17 00:00:00 2001
From: Anton Popov <anton@clickhouse.com>
Date: Tue, 7 Feb 2023 14:58:34 +0000
Subject: [PATCH] randomize setting
 'ratio_of_defaults_for_sparse_serialization'

---
 tests/clickhouse-test | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/tests/clickhouse-test b/tests/clickhouse-test
index 4361b64b62f..e84c9beed5d 100755
--- a/tests/clickhouse-test
+++ b/tests/clickhouse-test
@@ -511,7 +511,9 @@ class SettingsRandomizer:
         "merge_tree_coarse_index_granularity": lambda: random.randint(2, 32),
         "optimize_distinct_in_order": lambda: random.randint(0, 1),
         "optimize_sorting_by_input_stream_properties": lambda: random.randint(0, 1),
-        "enable_memory_bound_merging_of_aggregation_results": lambda: random.randint(0, 1),
+        "enable_memory_bound_merging_of_aggregation_results": lambda: random.randint(
+            0, 1
+        ),
     }
 
     @staticmethod
@@ -524,10 +526,9 @@ class SettingsRandomizer:
 
 class MergeTreeSettingsRandomizer:
     settings = {
-        # Temporary disable due to large number of failures. TODO: fix.
-        # "ratio_of_defaults_for_sparse_serialization": threshold_generator(
-        #     0.1, 0.6, 0.0, 1.0
-        # ),
+        "ratio_of_defaults_for_sparse_serialization": threshold_generator(
+            0.3, 0.5, 0.0, 1.0
+        ),
         "prefer_fetch_merged_part_size_threshold": threshold_generator(
             0.2, 0.5, 1, 10 * 1024 * 1024 * 1024
         ),
@@ -1222,7 +1223,7 @@ class TestCase:
             )
             result.check_if_need_retry(args, stdout, stderr, self.runs_count)
             # to avoid breaking CSV parser
-            result.description = result.description.replace('\0', '')
+            result.description = result.description.replace("\0", "")
 
             if result.status == TestStatus.FAIL:
                 result.description = self.add_info_about_settings(result.description)
@@ -1678,7 +1679,12 @@ def check_server_started(args):
             print("\nConnection timeout, will not retry")
             break
         except Exception as e:
-            print("\nUexpected exception, will not retry: ", type(e).__name__, ": ", str(e))
+            print(
+                "\nUexpected exception, will not retry: ",
+                type(e).__name__,
+                ": ",
+                str(e),
+            )
             break
 
     print("\nAll connection tries failed")
@@ -1955,6 +1961,7 @@ def reportCoverage(args):
         )
     )
 
+
 def reportLogStats(args):
     query = """
         WITH